Millennium:2nd millennium
  • 1817
  • 1818
  • 1819
  • 1820
  • 1821
  • 1822
  • 1823
1820 in various calendars
Gregorian calendar1820
Ab urbe condita2573
Armenian calendar1269
Assyrian calendar6570
Balinese saka calendar1741–1742
Bengali calendar1227
Berber calendar2770
British Regnal year60 Geo. 3 – 1 Geo. 4
Buddhist calendar2364
Burmese calendar1182
Byzantine calendar7328–7329
Chinese calendar己卯年 (Earth Rabbit)
4516 or 4456
    — to —
庚辰年 (Metal Dragon)
4517 or 4457
Coptic calendar1536–1537
Discordian calendar2986
Ethiopian calendar1812–1813
Hebrew calendar5580–5581
Hindu calendars
 - Vikram Samvat1876–1877
 - Shaka Samvat1741–1742
 - Kali Yuga4920–4921
Holocene calendar11820
Igbo calendar820–821
Iranian calendar1198–1199
Islamic calendar1235–1236
Japanese calendarBunsei 3
Javanese calendar1747–1748
Julian calendarGregorian minus 12 days
Korean calendar4153
Minguo calendar92 before ROC
Nanakshahi calendar352
Thai solar calendar2362–2363
Tibetan calendar阴土兔年
(female Earth-Rabbit)
1946 or 1565 or 793
    — to —
(male Iron-Dragon)
1947 or 1566 or 794
February 6: Capture of Valdivia

1820 (MDCCCXX) was a leap year starting on Saturday of the Gregorian calendar and a leap year starting on Thursday of the Julian calendar, the 1820th year of the Common Era (CE) and Anno Domini (AD) designations, the 820th year of the 2nd millennium, the 20th year of the 19th century, and the 1st year of the 1820s decade. As of the start of 1820, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.



February 23: Cato Street Conspiracy


  • April – Hans Christian Ørsted discovers the relationship between electricity and magnetism.
  • April 1 – A proclamation, signed "By order of the Committee of Organisation for forming a Provisional Government", begins the "Radical War" in Scotland.
  • April 8 – The statue of the Venus de Milo (Aphrodite of Milos, c.150 BC-125 BC) is discovered on the Greek island of Milos, by a peasant named Yorgos Kentrotas.[8]
  • April 12Alexander Ypsilantis is declared leader of Filiki Eteria, a secret organization to overthrow Ottoman rule over Greece.
  • April 15 – King William I of Württemberg marries his cousin, Pauline Therese, in Stuttgart.
  • May 1 – The last hanging, drawing and quartering in Britain is meted out to the Cato Street conspirators for treason (only hanged and beheaded).
  • May 11HMS Beagle (the ship that will later take young Charles Darwin on his scientific voyage) is launched at Woolwich Dockyard.
  • May 20John Stuart Mill sets out on his formative boyhood trip to France.
  • June 5Caroline of Brunswick, the estranged wife of King George IV of the United Kingdom, returns to England after six years abroad in Italy, where she had been carrying on an affair; since ascending the throne in January, the King has sought to receive his government's approval for a divorce.[9]
  • June 10Sir Thomas Munro is appointed as the British colonial Governor of the Madras Presidency, which encompasses most of southern India.[10]
  • June 12
    • Élie Decazes, leader of the opposition in France's Chamber of Deputies, successfully introduces the "Law of the Double Vote", a proposal to add to the 258 existing legislators by creating 172 seats that would be "selected by special electoral colleges" made up of the wealthiest 25% of voters in each of France's departments.[11]
    • Delegates in St. Louis, Missouri Territory approve a proposed state constitution, proclaiming that they "do mutually agree to form and establish a free and independent republic, by the name of "The State of Missouri".[12]
  • June 29 – The cause of action that will lead to the U.S. Supreme Court case known simply as The Antelope arises, when a U.S. Treasury cutter captures a ship of the same name, which is transporting 281 Africans who had been captured as slaves, in violation of the 1808 U.S. law prohibiting the slave trade.[13]



Date unknown




Date unknown

  • Song Qing, Chinese general (d. 1902)



King George III



  1. ^ Miguel A López-Morell (June 28, 2013). The House of Rothschild in Spain, 1812–1941. Ashgate Publishing, Ltd. p. 46. ISBN 978-1-4724-0424-4.
  2. ^ a b Jones, A. G. E. (1982). Antarctica Observed: who discovered the Antarctic Continent?. Caedmon of Whitby. ISBN 0-905355-25-3.
  3. ^ William George Lovell (2005). Conquest and Survival in Colonial Guatemala: A Historical Geography of the Cuchumatán Highlands, 1500-1821. McGill-Queen's Press - MQUP. p. 116. ISBN 978-0-7735-2741-6.
  4. ^ a b c Alexander Charles Ewald (1868). The Last Century of Universal History: A Reference Book, Containing an Annotated Table of Chronology, Lists of Contemporary Sovereigns, a Dictionary of Battles and Sieges, and Biographical Notes of Eminent In-dividuals. From 1767 to 1867. F. Warne & Company. p. 67.
  5. ^ a b "Fires, Great", in The Insurance Cyclopeadia: Being an Historical Treasury of Events and Circumstances Connected with the Origin and Progress of Insurance, Cornelius Walford, ed. (C. and E. Layton, 1876) pp69
  6. ^ Lefgren, J. C. (October 2002). "Oh, How Lovely Was the Morning: Sun 26 Mar 1820?". Meridian Magazine. (available at http://www.johnpratt.com/items/docs/lds/meridian/2002/vision.html)
  7. ^ Randal S. Chase (August 15, 2014). Pearl of Great Price Study Guide: Moses, Abraham, The Last Days, and Joseph Smith. Plain & Precious Publishing. p. 264. ISBN 978-1-937901-33-2.
  8. ^ School Arts. Davis Publications. 1922. p. 444.
  9. ^ Christopher Hibbert, Wellington: A Personal History (Da Capo Press, 1999) p220
  10. ^ T. H. Beaglehole, Thomas Munro and the Development of Administrative Policy in Madras 1792-1818 (Cambridge University Press, 22010) p121
  11. ^ Munro Price, The Perilous Crown: France Between Revolutions, 1814-1848 (Pan Macmillan, 2010) p108
  12. ^ "Missouri", in Constitutional Documents of the United States of America 1776-1860", ed. by Horst Dippel (K. G. Saur, 2007) p221
  13. ^ "Antelope Case", by John T. Noonan, Jr., in Dictionary of Afro-American Slavery, (Greenwood, 1997) p66
  14. ^ Drewry, Charles Stewart (1832). "Section III". A Memoir of Suspension Bridges: Comprising The History Of Their Origin And Progress. London: Longman, Rees, Orme, Brown, Green & Longman. pp. 37–41. Retrieved August 16, 2011.
  15. ^ Matthew Anthony Fitzsimons; Jean Bécarud (1969). The Catholic Church Today: Western Europe. University of Notre Dame Press. p. 162. ISBN 978-0-268-00307-4.
  16. ^ Paul W. Schroeder (January 1, 1962). Metternich's Diplomacy at its Zenith, 1820-1823: Austria and the Congresses of Troppau, Laibach, and Verona. University of Texas Press. p. 98. ISBN 978-0-292-75034-0.
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  18. ^ The South Atlantic Crisis: Background, Consequences, Documentation : August 1982. U.S. Department of State, Bureau of Public Affairs, Office of Public Communication, Editorial Division. 1982. p. 4.
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  20. ^ "Anne Brontë | British author". Encyclopedia Britannica. Retrieved April 17, 2019.
  21. ^ Calendar of Spanish Anniversaries. Tardy publishing Company, Incorporated. 1935.
  22. ^ William Tecumseh Sherman (1891). Memoirs of Gen. William T. Sherman: By Himself. To which are Added Chapters Completing His Life and Including His Funeral Obsequies by W. Fletcher Johnson and Carefully Reviewed by Major-General O. O. Howard. D. Appleton. pp. 438–.
  23. ^ United States. Congress (1966). Congressional Record: Proceedings and Debates of the ... Congress. U.S. Government Printing Office. p. 3217.
  24. ^ Frank Moore Colby; Harry Thurston Peck (1902). The International Year Book. Dodd, Mead. p. 646.
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  37. ^ The Musicians's Year Book. E.P. Dutton. 1895. p. 145.
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  39. ^ Munich. Schackgalerie (1911). Schack Gallery in Munich: In the Possession of His Majesty the German Emperor, King of Prussia. G. Hirth. p. 69.
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  41. ^ Charles Edwards Lester (1858). The Democratic Age: Statesmanship, Science, Art, Literature, and Progress. Hale, Valentine & Company. p. 204.
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  48. ^ August Falkmann (1887), "Pauline", Allgemeine Deutsche Biographie (ADB) (in German), vol. 25, Leipzig: Duncker & Humblot, pp. 275–277

Media files used on this page

Engels in 1877 in Brighton
Herbert Spencer.jpg
Herbert Spencer (27 April 1820 - 8 December 1903) was an English philosopher. Creator Unidentified photographer Medium Medium unknown Dimensions 20.4 cm x 14.6 cm Date Prior to 1903 Contained in Scientific Identity: Portraits from the Dibner Library of the History of Science and Technology Image ID SIL14-S005-09 Keywords science, biology, physics, scientist, Physicist, biologist, Henry Morton Stanley
清 佚名 《清仁宗嘉庆皇帝朝服像》.jpg
Qing Dynasty Anonymous "The Emperor Renzong Jiaqing of the Qing Dynasty"
Florence Nightingale three quarter length.jpg
Three Quarter length portrait of Florence Nightingale
Susan B Anthony c1855.png
Public relations portrait of Susan B. Anthony as used in the History of Woman Suffrage by Anthony and Elizabeth Cady Stanton, Volume I, published in 1881.
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